On Sunday, Oct. 31, Tracy Romulus, Kim's longtime friend and the chief marketing officer of her KKW Brands, shared a carousel of Halloween pics to Instagram of her own daughter Ryan Romulus, along with North and the girls' friend Haidyn.
The images showed the three girls dressed in matching pink and green two-tone wigs, black metal band-style T-shirts, black skirts, studded belts and bloodied platform boots.
"Cereal Killers," Tracy captioned it, adding knife, spiderweb, bowl, drop of blood and skull emojis.
Last month, Kim offered insight into her 8-year-old daughter's personality when she told Ellen DeGeneres about North, "She puts fake tattoos on her face, and she listens to Black Sabbath, and she's just like a full goth girl." Along with North, Kim and ex Kanye West share children Saint West, 5, Chicago West, 3, Psalm West, 2.
A source told E! News that the 41-year-old SKIMS founder and 27-year-old Saturday Night Live cast member are friends. The two stars attended the theme park with newly engaged couple Kourtney Kardashian and Travis Barker, in addition to other friends.
Kourtney and Travis have definitely embraced the spooky season, as their costumes this year included Sid Vicious and Nancy Spungen, along with the pair dressing as the lead couple from the 1993 film True Romance.